I think of this as a best-of-three-sets tennis match. Imagine the first set is your past which you lost. So it's a bad past. Now imagine the second set is just about to get over, this is present, and you are one point away from winning this set after which it too will be past. But then think about it, your future, the crucial third set that will decide the winner of this match, will no way depend on the first set that you lost if you win the second set because going into the third set, you will be going in with the motivation and form you will gain after you win this one point and win the second set, the present. So I guess it all comes down to the present. Our present define our future and past is pretty much irrelevant.